They actually were working on their own Tribes-like game called Ascension (oddly enough). It looked like it'd gotten pretty far but after 6+ years of development they pulled the plug on it last January, I think due to lack of resources. The Ascension website was fully functional at one point with media and screenshots, but it's no longer live.

(EDIT) Well this is interesting... Another forum post (linked below) mentions that the Renwerx/Ascension team was acquired by a "major studio". It may be a leap, but given the similarity between the names Ascension and Ascend, I have to wonder if the former Renwerx folks are now working on Tribes: Ascend?